Furnace.



PATEIQTTED MAR. a, 1908.

J. A. WALDBURGER.

FURNACE.

APPLICATION FILED FEB.19.1 907.

4 SHEETS-SHEET 1.

PATENTED MAR. 3, 1908.-

J. A.. WALDBURG-BR.

FURNACE.

APPLICATION FILED FEB.19,19O7.

SHEET$-SHEET 2.

PATENTED MAR. a, 1 908 J. A. WALDBURGER.

FURNACE, APPLICATION FILED FEB.1-9, 1907.

4 SHEETS SHEET 3.

PATENTED MAR. 3, 1908.

J. A. WALDBURGER.

FURNACE.

APPLICATION FILED PEB.19, 1907.

4 SHEETS-SHEET 4.

messes:

Z flaveiafaz UNITED STATES PATENT OFFICE.

ENGINEERING COMPANY, SYLVANIA.

No. 880,2540. Specification of A plication filed February 19; 1907. Serial No. 358.134.

circulate below the articles to be heated as Well as above. The construction WllQ-IGl) this object is secured is shown in. the aecoinpanying drawings, wherein,

Figure l is a view in front elevation partly in section, the sectional portions bcing'indicatedby the line I*--l of Fig; 2. i Fig. 2 is a )artial-longitud in al vertical section indicated y the line'IIlI'ol Fig. 1..- Figs. 3 and 4 are vertical cross seclional views on an enlargecl sca'Pe indicated by the lines l ll-I ll and IV]V respectively-"0f Fig. 6. Fig. 5,

a horizontal sectional view on. two planes, indicated by the section'line VV of Fig. '4.- Fig. 6-isa longitudinal vertical sectional view similar to Fig. 2 sliowing a modified construction providing for circulation of the heated air and gas. Fig. Y-is a vertical scetional view on the line VIIVII of Fig. 6..

. The furnace is generally constructed similar to heating furnaces for the sanii 'purpose. being provided with the usual sidewalls 2,2, longitudinally arranged supporting ridges, benches or piers 3 having intervening spaces 4 for reception of the slag which ordinarily falls down upon the lloor of the furnace, and is closed at the ends by walls 5, 5, and covered by the usual arched roof 6. The roof as shown is constructed by double arched layers having an intervening longitudinally extending air space 7, through which the air circulates and becomes heated in its progress toward the front end of the furnace, becoming mixed with the gas for combustion.

8 is thelmain gas supply pipe from yvhichhy valve-controlled passages 9 the gas circulates to the interior of the furrow-e, the gases of eonilnedion passing backwardly above be hem-hos as indicated by the arrows a and finally outward to the stack FURNACE.

Letters Patent. rammed March a, 1908.

through tunnel-l0 or any other suitable con. ductor. At each. side 01'' the furnace, extending downwardly through 'the walls, are located supplemental gas supply ports 11, 'communi'cating by pipes 0 with. the main pipe 8, as clearly shown in Fig. 1, while similar air supply ports 12 opening to the atmospl'iere lead downwardly through the walls adjacent to ports- 11, -the,g s ports and air ports communicating with independent cross ports .13, 1.4, respectively extending transversely of the furnace as shown. this construction air and gas are introduced into the lower front portion of the furnace, 4

becoming heated in their passage through the walls, and the air and gas commingle by means of communicating ports leading upwardly from ports '13 and 14 and emerge by a common port 15 intothe lowerl'ront portion of thelurnacc, below the ingots, .etr. lying upon benches 5- Such gas and air in com hustion circulate lmckwarrllyunderneath the ol ijecl arrows I), finally escaping to the slack through crulduil 1*). The floor of the furnacc between the benchcsg, for a considerable portion of its lengtl'i, is sloped dmvnwardly' to be lu-ated, as indicated-by the toward one end as indicated at 16 Figs. 2 and (i, such sloping botlom portions leading into a (:1'oss"cl|annol or gutter 1' opening outwardly at one or both sides of the furnace. By this construction the slag at the hottest end of the furnace will flow down alongthe lloor and .outwzu'dly, thereby preventingan :weuniulation ol slag or'other 'rel'use, and

% facilitating-the l'ree circulation of the gasps.

The under circulation, as thus provided for, constitutes the important feature of my invention, giving a thorough, even heating action upon all portions of the arlieles being treated, and is secured by means o be lower distributing ports for the gas and air. It will be umlcrstood that the gas supply passages us well as the air supply passages are crmtrollcd by suitable dampers or valves, whereby the amount of each may be suitably regulated to suit the requi'nm'lcnts as will be readily understood.

ill)

In Fig. 2 I have shown a construction.

whereby the heated incoming air passing through channel 7 dcllcclerl upwardly by means of a conduit I'S nto an air box 19 located above the furnace, and provided with sup ly conduits 20 leading downwardly .by which the previousl hig .into the er front interior of the furnace at the point 0 combustion, immediately above and in front of 'the'gas' supply ports. rBy this-construction I secure a more thoroug 'com'mingling of the air and gas by directing the flowof the air, and also providemeans coming through the den 'le arched rpof may be partially'utilized after mixture wlththe gas for the under supply.

As shown in Figs. 1' and 2, the gas is conducted as described to'the lower port 13-'by readily .scri .t1on.

ports 11 and pi es-9, while-conductors21 at one o1f 'both s1 es communicate with ,theair port l; soithatthe heated, air com'blnm" with the gas from port 13 will thus reac the oint ofconibustion underneath the ingots.

nfa highly heated condition. lhe circulation of the gas otherwiseis however the same as haslalreadybeen described." A f. g

The operation of the invention will be understood from e articles to 'be treated are preferably introduced from thebac k endand caused to.

travel through the furnace toward the com" bastion endgthereonr being.introduced and takeawa throngh'fsuitable door-covered openings 22, and 23 'in the usual way. The heating operation is. rendered more even and 1 rapid [by rcason'of the combustion ofthe gas both above and below and necessarily around the ingots at all sides, and results in a greater "output more oucwssfu'l operationof the What I'claim isz l The inyention. may be changed .or varied in different features or details of construc tion, or its novel features maybeiapplied to furnaces of other or'diiferenttypes, but all such changes are to. be considered asfwithin the scope of the followingclfnn's;

1. A heating furnace provided tudinally arranged supporting benches having vertically arranged side walls and'intervening sp ces downwardly sloping floors, and trans ars: ..ir'and gas ports each communicating with ports opening into said spacesbelow the top-of said benches at the lower end of said sloping floors, substantially asset forth.

2. A heating furnace provided with longitransverse air and gas ports each communily heated air a the sup L the foregoing de with longi-' with a series of supporting benches separated by intervening spaces, of inclosing walls,

lower transverse air and-gas orts communi :9. In aheatineating with ports opening into said spaces below the supporting level of said benches, substantially as set forth; T

-4. A heating furnace provided with supporting benches and intervening spaces, and transverse air and gas ports each communieating with ports opening into said spaces below the sup with additiona l combustion above the su portnlg surface 'of said benches, substantia y asset forth.

*5. i A heating furnace provided with supporting benches and'interve'ning spaces, and

a transverse-fuelsupply port communicating through the-wall o the furnace with-a fuel supply conduit and opening into the lower front por'tion'of said intervening spaces below of said benches, suborting level stantia y asset forth. V

6. In a'heating furnace, the combination orting level of said benches,, Ineansfor s'upplyingfuel in with the 'inclosing walls' andlongitudinally arranged support'rwg benches se arated by intervening spaces, of transverse y arranged air and gas sup ly ports located in front of- ,and. below the evel of the supporting walls and having ports leading upwardly and'bodily-through the brickwork to deliver fuel to the spaces between and below the upper sur face of the supporting benches, substantially asset forth. v

' .7. In a'heating furnace, the combination with theinclosing walls and longitudinally arranged supporting benches se arated by .interveningspaces, of transverse y arranged." an and gas supply orts located in, front of;

and-below the eve of the supporting walls and having ports leading upwardly and bodily through the brickwork to deliver fuel to the spaces between and below'the upper sur face of the su pprting walls, and means for supplying fue 1m combustion above said 7 benches, substantially as set forth.

8. In a heating furnace, the-combination cat'ing with ports opening be ow the tops-of tially as set forth.

furnace, the combination with a series of supporting benches separated by intervening spaces, of aninclosing structure provided with lower transverse air and" gas ports communicating with ports openinginto the front lower portion of the furnace interior and embodying preliminary heating ports leading to said transverse ports, and.

means for su plying gas through some of said. prelimi'na eating ports to said gas port, substantia ly 'as set f9rth.

' 10. In a heating furnace, the combination said benches, and means for heating and sup flying air and gas to said ports, substan-.;

with a series of supporting benches separated by intervening s mo es, of inf-losing walls and foundation brie work provided with transverse air and gas ports communicating with gas to said lower gas port and also to the sloping ports opening into the intervening upper interior of the furnace, and a hot air spaces below the tops of said benches, means conductor communicating With the air heatfor preliminarily heating and supplying air ing passage of the roof, with said lower transand gas to said transverse ports, and means I verse air passage, and with the upper interior for supplying air and gas to the upper interior of the furnace respectively, substantially as of the furnace, substantially as set forth. set forth.

11. In a heating furnace, the combination In testimony whereof I affix my signature with a series of supporting benches separated in presence of two Witnesses. by intervening spaces, inclosing Walls pro- JOHN A. l/VALDBURGER. vlded with circulation ports, and a roof hav- Witnesses: ing an air heating passage; of lower trans C. M. CLARKE, verse air and gas ports, means for supplying CHAS. S. LEPLEY. 

